Preston, the Vanisher, Umbral Collar Zealot, Sister Hospitaller, and Chord of Calling

Prerequisites

• Preston, the Vanisher on the battlefield
• Umbral Collar Zealot on the battlefield
• Sister Hospitaller in hand
• Chord of Calling in hand
• at most available

Steps

1. Cast Chord of Calling by paying at most , searching your library for Sister Hospitaller and putting it onto the battlefield
2. When Sister Hospitaller enters, it and Preston trigger
3. Resolve the Sister Hospitaller trigger, returning an applicable target from your graveyard to the battlefield
4. Holding priority, activate Umbral Collar Zealot by sacrificing Sister Hospitaller
5. Resolve the Preston trigger, creating a token copy of Sister Hospitaller that is a 0/1 Illusion
6. When the Sister Hospitaller token enters, it triggers, returning Sister Hospitaller from your graveyard to the battlefield
7. Repeat from step 2

Results

• Infinite ETB
• Infinite LTB
• Infinite creature tokens
• Infinite death triggers
• Infinite recursion of creature cards in your graveyard
• Infinite sacrifice triggers
• Infinite surveil
• Infinite lifegain
• Infinite lifegain triggers